Bolt and nut locking device.



PATENTED Nov. 17, was,

No. M4338.

G; OLIVER. BOLT AND mm: LOGKENG DEVICE.

APPLICATION mm JULY 30, 1903. H0 MODEL.

UNITED STATES Patented November 17, 1903. I PA E OFFICE;

, p p ,GEORGE WASHINGTON OLIVER, orfs'r. LoUIs,-i\i-issoURI; ff

' oL ANo NUT Loc'Kme news-E.

srncrrlcarronrormin part of Letters Patent No. 744,388, dated master 1?,ieoa Application and Jui so, 1903.

To all whom ,itvnay concerns "Be it known that I, GEORGE WASHINGTONOLIVER, a citizen offthe United States, residing at St. Louis, in theState of Missouri, have invented ,certainnew and useful Improvements inBolt and-Nut Locking Devices, of

which the following is a Specification.

'My invention relates to that class of bolt andnut locking devices inwhicha washer surrounding the bolt is constructed to engage the side ofthe nut and to lock it to the object to which the bolt and nutare-applied.

The objectof my invention is to p'rovide'a simple and inexpensivedeviceof this'general class which may be easily applied .and which willse''iirely lock. the nut and bolt in place and will prevent/theirseparation or looseniug either by-jars or by the expansion orcontraction of any of the associated parts.

In carrying out my invention I-"do not in any way change or modifyeither the nut or the bolt. Three areof usual construction. I employtwowashers, one of which consists of a flange ring, preferably ofrelatively soft m etal,whi:e the other consists ofa hardmetal'(preferably spring-steel) ring having one or more series of radialcorrugations that are hold ofthe object to which the bolt is applied,

aiid afterward portions ofvthe flangedwasher 4 are driven into thegrooves of the corrugated washer, thereby locking the two Washerstogether; while the nut is held by the flange of the outer washer.-While the corrugated washer is being made to engage the object to whichthe bolt is applied, the corrugations are somewhat compressed, and thusany expansion of the bolt is compensated for by the relaxationof thecorrugations.

"In the accompanying drawings, Figure 1 shows a top plan view; of thecorrugated washer. Fig. 2 shows atop plan view of the flanged washer.Fig. 3 shows a vertical cens -innaieneis, mama;

ytral section throughthe nutand washers with the boltzin elevation.Fig.4 shdwsjaperspective view of the assembledparts.

The bolt 7 and nut Bare of usual form or may he of any suitableconstruction. I have illustrated a hexagonal nut; but any polygonal nutmay be employed. The corrugated with its ridges next the object 9 towhich the bolt is applied. The flanged washer 4 ispreferably made ofrelatively soft metal or such metal as will enable it to have one ormore portions driven into the grooves of the corrugations 2. Thiswasheris annular in form, but onone side is provided with aperpendicular flange 5; This washer is placed on the threadedend of thebolt and is adapted to restagainst the outer face of the corrugatedwasher in, the manner indicated in Fig.3. The nut 8 rests against theouter face of the flanged Washer 4, with one of its sides against theflange 5'. At first when the nut is being screwed onto a bolt thefiangedwasheret may turn with the nut; but when the nut is screwed" homethe-washer 4 and nut 8 are held stationary by reason of the engagementof the washer 4 with the corrugated washer 1. In the act of screwing thenut home the corrugations 2 and 3 are caused to engage the object 9, to

which the bolt is applied, in the manner indicated in Fig. 3. Thecorrugations are slightlycompressed and put under tension and are driveninto the object 9, if this object, is of soft material, such as wood.The corrugations 3 will enter the oval holeof a fish-plate, if theboltis applied to a railway fastening.

In order to make the connection entirely se-.

cure, the soft-metal washer maybe driven intoone or more of the groovesof the corrugations, as indicated at 6 in Fig. 3. When the parts arethusalockedfogethen thereis no danger of their working loose. Should itIOO be desired to remove the nut, it can be most conveniently done bymerely bending over the flange 5 or. breaking it off with a suitabletool, thus preserving the more expensive part 1.

I claim as my invention- 1. A bolt and nut locking device comprisin g ametal washer having radial corrugations forming grooves on one side andribs on the opposite side and a superposed washer having a perpendicularflange adapted to engage the nut and which is adapted to be placedagainst the grooved side of the corrugated Washer and to have partsdriven into the grooves thereof. a

2. A bolt and nut locking device comprising a metal washer havingcorrugations V- shaped in cross-section forming grooves on one side ofthe washer and ribs on the opposite side thereof and a superposed washeradapted to bear against the grooved side of the first-mentioned washerand to have parts driven into the grooves thereof and having alsoaflange adapted to engage a nut.

3. The combination ofa bolt,a nut, a washer having corrugations near itsperiphery and also near its center which form ribs on one side of thewasherand grooves on the opposite side thereof and a superposed washeradapted to rest against the grooved side of the first-mentioned washerand to have parts driven into the grooves of said washer and having alsoa flange adapted to engage a nut.

GEORGE WASHINGTON OLIVER.

\Vitnesses:

H. S. \VILSON, Jos. H. LINTON.

